There are some softwares
which will allow you access linux partitions from windows. But it's not good idea to get write access on linux partitions from windows. If you want a common space between two OS's, then I suggest you to make a separate partition in windows with FAT or FAT32 file system. Mount this drive in linux. Now you will get write access on this partition from both OS's. It's just a suggestion. There may be other ways, wait and see, you may get many replies.